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Section 6.3.9.1 (802.16-2004 D5) states that: “On initialization or after signal loss,
the SS shall acquire a downlink channel. The SS shall have nonvolatile storage
in which the last operational parameters are stored and shall first try to
reacquire this downlink channel. If this fails, it shall begin to continuously
scan the possible channels of the downlink frequency band of operation until it
finds a valid downlink signal”. I think that going to the last operational parameters as default is
not always optimal. Assuming an SS is installed and establishes connection with
a certain BS – the relevant operational parameters will be stored. Assume
now that a new BS is installed from which the SS can receive a better service
(more efficient modulation). Since the SS is required to establish connection
with parameters from the nonvolatile memory first, it will not be able to
connect to the new BS. I suggest replace “shall” with “may” in the
paragraph above. Eyal |